alt.energy.homepower

Howard Epstein wrote:
> The current maximum effiecency for Photovoltaic cells is 22 % by Suntek.
>
> There is a company out there call Prism Technologies that uses holograms
> as a passive concentrator. They have several demo units but full
> production is not expected until at least
> March of 2009. Does anybody know how much this will increase the
> efficiency of a solar cell ?

I don't know how much concentration alone increases efficiency but
the current record holder is a 3 layer cell using concentration
with a % efficiency.

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Anthony